Enable ComCtl32.dll v6 via launcher executables (#321)

Fixes #320

Author: Jesse205

src/pymanager/default.manifest

@@ -17,4 +17,10 @@
       <longPathAware xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">true</longPathAware>
     </windowsSettings>
   </application>
+  <dependency>
+    <dependentAssembly>
+      <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls"
+                        version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*" />
+    </dependentAssembly>
+  </dependency>
 </assembly>